Move main and isolate handling to enqueuer listeners.

pkg/compiler/tool/perf.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /// An entrypoint used to run portions of dart2js and measure its performance.
 library compiler.tool.perf;
 
 import 'dart:async';
 import 'dart:io';
 
@@ skipping 349 matching lines @@
         // Note: we enqueue everything in the program so we measure generating
         // kernel for the entire code, not just what's reachable from main.
         libraryLoader.libraries.forEach((LibraryElement library) {
           enqueuer.resolution.applyImpact(computeImpactForLibrary(library));
         });
 
         if (deferredLoadTask.isProgramSplit) {
           enqueuer.resolution
               .applyImpact(backend.computeDeferredLoadingImpact());
         }
-        enqueuer.resolution.applyImpact(backend.computeHelpersImpact());
         resolveLibraryMetadata();
         reporter.log('Resolving...');
-        processQueue(enqueuer.resolution, mainFunction);
+        processQueue(enqueuer.resolution, mainFunction, libraryLoader.libraries);
         enqueuer.resolution.logSummary(reporter.log);
 
         (reporter as CompilerDiagnosticReporter)
             .reportSuppressedMessagesSummary();
 
         if (compilationFailed) {
           // TODO(sigmund): more diagnostics?
           print('compilation failed!');
           exit(1);
         }
 
         closeResolution();
         var program = (backend as dynamic).kernelTask.program;
         print('total libraries: ${program.libraries.length}');
       });
 }